Hey guys i have a 1986 mazda rx7 na base that i just got not so long ago it is completely stoc, and the u joints have crapped out on me and i have decided to buy an aftermarket driveshaft from Mazdatrix. So my question is how do i maintain the driveshaft balanced?

The second thing i need help on is my 13b when the car is not in motion moves a lot. I dont think this is normal does anyone have any clue on what this may be? im thinking it may be the motor mounts but even still if the motor mounts were bad would the whole engine like that?

Thank you any other advice would also be helpfull im new to all this thanks!

 

drive shaft is good right out of the box for install.
what do you mean by the car moves a lot?
engine?.clunking?..be more specific.

 

if the engine moves at all when idling, you've got loose or mushy engine mounts and or tranny mounts

 

Thank you misterstyx69! Yes sorry the engine moves when idling but when the i accelerate the engine it seems to go away and when i accelerate it into the high rpms and release it the engine seems to want to die on me butr it then goes but to 750 rpm.

 

How would you check if its the egine mounts? is there a way to tell? I think this might have happened because of all the vibration that occured when i drove it around with bad ujoints all that vibration was probably not good for the car.

 

Engine mounts are most lilkey the culprit. Mine shook a lot too but it was more in spurts while idling

 

tranny mounts might be it too!

 

Could that be the reason for a clicking noise as while? At like 3500 rpm?